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Keep the heat going for even longer. These spare units let you keep a battery charged up and ready for your ThermaCELL Heated Insoles. Batteries recharge in four hours or less and last up to five hours. Power up using the Included Smart Charging Case or USB cable.
WARNING: Lithium-ion Batteries and/or products that contain Lithium-ion Batteries can expose you to chemicals including cobalt lithium nickel oxide, and nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm.